<template>
    <!--引入container布局-->
    <el-container class="home-container">
        <!--头部-->
        <el-header>
            <div class="div_top">
                <img src="../assets/logo.jpg" alt="" class="logo_img"/>
                <span class="span_title">个人运动平台</span>
            </div>
            <el-button type="info" @click="logout">安全退出</el-button>
        </el-header>
        <!--主体-->
        <el-container>
            <!--侧边栏-->
            <el-aside :width="isCollapse?'64px':'200px'">
                <div class="toggle-button" @click="toggleCollapse">|||</div>
                <el-menu background-color="#545c64" text-color="#fff" active-text-color="#409eff"
                         unique-opened="" :collapse="isCollapse" :collapse-transition="false" :router="true"
                         :default-active="activePath">
                    <!--unique-opened只打开一个伸缩栏-->
                    <!--一级菜单-->
                    <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
                        <template slot="title">
                            <i :class="iconsObject[item.id]"></i>
                            <span>
                                {{item.title}}
                            </span>
                        </template>

                        <!--二级菜单-->
                        <el-menu-item :index="it.path" v-for="it in item.sList" :key="it.id" @click="saveNavState(it.path)">
                            <template slot="title">
                                <i :class="iconsObject[it.id]"></i>
                                <span>
                                    {{it.title}}
                                </span>
                            </template>
                        </el-menu-item>
                    </el-submenu>
                </el-menu>
            </el-aside>
            <!--内容-->
            <el-main>
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>
<script>
    export default {
        data() {
            return {
                //菜单列表
                menuList: [],
                //伸缩
                isCollapse: false,
                // 左侧菜单
                menuList: [],
                iconsObject: {
                    '100': 'iconfont iconguanliyuan',
                    '200': 'iconfont iconsport',
                    '101': 'iconfont icondenglu',
                    '102': 'iconfont iconmima',
                    '103': 'iconfont iconsport',
                    '104': 'iconfont iconshangpin',
                    '201': 'iconfont iconshu',
                    '202': 'iconfont iconkaluli',
                    '203': 'iconfont iconshiwu',
                    '204': 'iconfont icondenglu',
                },
                activePath: '/welcome',//默认路径
            }
        },
        //onload 事件
        created() {
            //查询menuList
            this.getMenuList();
            this.activePath = window.sessionStorage.getItem('activePath');//取出session里的path, 动态修改activePath
        },
        methods: {
            //安全退出
            logout() {
                window.sessionStorage.clear();//清楚session
                this.$router.push("/login");//回到首页
            },
            //获取导航菜单方法
            async getMenuList() {
                const {data: res} = await this.$http.get("menus");
                console.log(res);
                if (res.flag != 200) return this.$message.error("获取列表失败");//访问失败错误信息
                this.menuList = res.menus;//数据回填
            },
            //控制侧边栏伸缩
            toggleCollapse() {
                this.isCollapse = !this.isCollapse;
            },
            //保存路径
            saveNavState(activePath) {
                window.sessionStorage.setItem('activePath',activePath);//存储在session里
                this.activePath = activePath;
            }
        }
    }
</script>
<style scoped>
    /*布局器*/
    .home-container {
        height: 100%;
    }

    /*头部*/
    .el-header {
        background-color: #373d41;
        display: flex;
        /*两边对齐*/
        justify-content: space-between;
        padding-left: 0%;
        align-items: center;
        color: #fff;
        font-size: 20px;
    }

    .div_top {
        display: flex;
        align-items: center;
    }

    .span_title {
        margin-left: 15px;
    }

    /*侧边栏*/
    .el-aside {
        background-color: #333744;
    }

    .el-menu {
        border-right: none;
    }

    /*主体*/
    .el-main {
        background-color: #eaedf1;
    }

    .logo_img {
        width: 55px;
        height: 55px;
    }

    /*伸缩按钮*/
    .toggle-button {
        background-color: #4A5064;
        font-size: 10px;
        line-height: 24px;
        color: #fff;
        text-align: center;
        letter-spacing: 0.2em;
        cursor: pointer; /*鼠标经过显示小手*/
    }
</style>